Start-Up Procedure
31
Note: It is necessary to connect a motor to load
terminals otherwise “Wrong
Connection” Protection is activated.
Other loads such as light bulbs, resistors,
etc. may also cause “Wrong Connection”
(Fault).
Start-up procedure with start-stop buttons
1. Connect Control Supply. On and Stop LEDs
will lit.
2. Review all parameters with Mode and Select
keys Set parameters as required.
3. If necessary, return to Default Parameters (see
“Service Mode” page 33).
4. Connect mains voltage to starter’s line
terminals.
5. Set LCD to show “MOTOR FLA” (% of
motor FLA).
6. Press Start. If motor starts to turn shortly after
Start signal, proceed to Para 7. If not, increase
“Initial Voltage” setting and start again.
When, upon starting, initial inrush current and
mechanical shock are too high decrease
“Initial Voltage” settings and proceed to Para
7.
7. Motor begins to turn. If speed accelerates
smoothly to nominal, proceed to Para 8. If
current during acceleration is too high,
decrease “Current Limit” setting and proceed
to Para 8. If motor speed does not accelerate
to nominal, increase Current Limit setting.
8. Press Stop and wait until motor stops.
9. Slightly increase Initial Voltage and Current
Limit settings to allow for load changes.
10. Press Start and see that motor is Acceleration
Time to full speed is as required.
11. If acceleration time is too short, increase
“Acceleration Time” setting.
12. Check total starting time and set Max. Start
Time to approx. 5 sec. Longer than the
maximum time required to complete the
starting process.
Examples of starting curves
Light Loads-Pumps, Fans, etc.
Initial Voltage (IV) – set to 30% (Factory Default)
Current Limit (CL) – set 300%
Acceleration Time (AT) – set 5 sec.
U%
100%
5
t
I%
600%
100%
50%
30%
10%
400%
300%
t
Voltage quickly increases to the Initial Voltage value
and then gradually ramps-up to nominal. Current
simultaneously and smoothly increases to reach
Current Limit setting or less, before smoothly
decreasing to the operating current. Motor speed will
accelerate to full speed quickly and smoothly.
High Inertia Loads – Fans, Centrifuges, etc
Initial Voltage – set 50%
Current limit – set 400%
Acceleration time– set 20 sec
U%
100%
20
t
I%
600%
100%
50%
10%
400%
t
Voltage and current increase until current reaches
“Current Limit value”. The voltage is held at this value
until motor is close to nominal speed, then current will
begin to decrease. The RVS-DN continues to ramp-up
the voltage until reaching nominal. Motor speed
smoothly accelerates to full speed.
Special starting – Using Dual Adjustment
Using two starting characteristics,
the starter will accelerate to DA-IV
reaching 100% current limit. After
Tx (Imm. Relay delay) voltage to
terminal 8 is switched off, using the
standard characteristic to complete
acceleration. Useful to prevent
initial high acceleration.
(Applications: Submersible pumps,
Drum fans with resonating
frequency, etc).
U%
100
t
2
t
25
10
t
1
Dual Adj. Par. Standard Par.
Initial Voltage 10% 25%
Acceleration Time tl = 2-30 sec t2 = 2-30 sec
Current Limit 200% 300-400%
Imm.Rel. ON delay Tx = 1-60 sec. -----
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